Xanthan Sulfuric Acid: An Efficient Bio-Supported and Recyclable Solid Acid Catalyst for the Synthesis of 2-minothiazole-5-carboxylates and 2-aminoselenazole-5-carboxylates
作者:Bowroju S. Kuarm、Janganati V. Madhav、Bhargavi Rajitha
DOI:10.2174/157017811797249443
日期:2011.10.1
An efficient method has been developed for the synthesis of 2-amino thiazole and selenazole-5-carboxylates from β-ketoesters, thiourea or seleno urea and N-bromo succinamide by using Xanthansulfuricacid as a solidacidcatalyst. The reaction work-up is very simple and the catalyst can be easily separated from the reaction mixture and reused several times in subsequent reactions.